Add APACI --permute-module=foo:bar option which can be used to

on-the-fly/batch permute the order of two modules (mod_foo and mod_bar)
in the Configuration[.apaci] file. Two special and important variants are
supported for the option argument: first BEGIN:foo which permutes module
mod_foo with the begin of the module list, i.e. it `moves' the module to
the begin of the list (gives it lowest priority).  And second foo:END
which permutes mod_foo with the end of the module list, i.e. it `moves'
the module to the end of the list (gives it highest priority).

Notice:
The way it is implemented looks a little bit too complicated but has to be
done this way because of portability reasons.  And this implementation is now
already tested by me for portability under the following platforms:
 o FreeBSD 2.2.2
 o Debian GNU/Linux 1.3/2.0.35
 o Solaris 2.5.1
 o SunOS 4.1.3


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@82319 13f79535-47bb-0310-9956-ffa450edef68